I have zero intention of using the GT Mini on any mode below 3.5A. Lol This seems like a long distance only light. There are other lights for use at lower levels, ones with bigger hot spots. There’s no need to mod this light in my opinion. (Unless it’s to increase output)

Who and where is that qoute from?
Are you saying you would want to use 2 × 18650 batteries? That does not make sense to me. One cell is not enough voltage overhead to use a buck driver, is it?

Sorry, I pulled that from theanual M4D M4X just posted. One cell is enough for a buck driver, but it will eventually drop out of regulation when the battery drops below the forward voltage of the LED. But at least you get stable output for part of the runtime, unlike a FET where output constantly decreases.

Not that the convoy holster isn’t nice but the GT mini deserves it’s own holster.

I think that most lights should come with a specific made holster or at least have a option to have a holster included.
Many lights that you can buy from the big brands have holsters included specially designed and made for that light.
I know it will push the price up but for a nice quality holster it’s well worth it I think.